Disable GPG signing for test commits

Author: andrew

test/test_helper.rb

@@ -28,6 +28,7 @@ def create_test_repo
       system("git init --initial-branch=main", out: File::NULL, err: File::NULL)
       system("git config user.email 'test@example.com'", out: File::NULL)
       system("git config user.name 'Test User'", out: File::NULL)
+      system("git config commit.gpgsign false", out: File::NULL)
     end
     @test_dir
   end